Download Electrical Insulation in Power Apparatus and Systems - Web

NPTEL Syllabus
Electrical Insulation in Power Apparatus
and Systems - Web course
COURSE OUTLINE
Power transmission at high voltages has acquired considerable prominance in
the recent times. To enhance the reliability of the power system network, it has
become essential to design and develop a compact, cost effective and reliable
insulation system.
Different insulating materials are used and they are subjected to multi stress
ageing. It is essential to understand the performance of the insulating material,
which is possible only when the fundamental characteristics of insulating
materials are known.
In this course a detailed analysis on characteristics of insulating material were
dealt. Insulation design to power apparatus, Methodology of testing of power
apparatus insulation, diagnostic testing techniques for power apparatus were all
detailed.
NPTEL
http://nptel.iitm.ac.in
Electrical
Engineering
Additional Reading:
Literature on testing techniques.
COURSE DETAIL
Bureau of Indian Standard codes on
electrical insulation and testing
practices.
Topic
Number of
hours
Dr. R. Sarathi
Department of Electrical
EngineeringIIT Madras
1. Insulating materials in high voltage Technology.
a. Requirement for insulating material.
b. Properties and testing of insulating materials.
i. Electrical properties.
ii. Thermal properties.
iii. Chemical Properties.
c. Natural inorganic insulation materials.
d. Synthetic inorganic insulation materials.
e. Natural inorganic insulation materials.
f. Synthetic organic insulating materials.
2. Electric Field Analysis in insulating materials.
a. Electric field and breakdown voltage.
i. Determination of electric fields.
ii. Maximum field strengths in geometrically similar
configurations.
iii. Formulation for the calculation of the breakdown
voltage.
iv. Fields in multidielectric, isotropic materials.
Coordinators:
5 Hrs
v. Breakdown probability.
b. Breakdown theory of gases.
i. Charge carriers in gases.
ii. Classical gas laws.
iii. self sustaining discharges.
iv. Breakdown mechanism in strong
inhomogeneous fields.
v. Breakdown characteristics under transient
voltages.
15 Hrs
c. Breakdown theory in solid insulating materials.
i. Charge carriers at low field strengths.
ii. Intrinsic breakdown.
iii. Thermal breakdown.
iv. Partial discharge breakdown.
v. Mechanism of failure in nanocomposite
materials.
d. Breakdown theory in Liquid insulation.
i. Electric strength of technical configurations with
insulating liquids.
ii. Theory of breakdown in liquid insulation.
e. Breakdown mechanism in vacuum insulation.
f. Breakdown mechanism in Cryogenic insulation.
3. Design and Manufacture of high voltage equipment.
a. Structural details in high voltage technology.
i. Basic arrangement of insulation system.
ii. Measures to avoid field intensification.
iii. Measures for air sealing oil insulated devices.
iv. Temperature rise calculation of insulation
system.
b. Design and development of high voltage
capacitors.
6 Hrs
c. Design and development of high voltage
bushings.
d. Design of transformer windings.
e. Design of insulators for indoor and outdoor
applications.
f. Design of instrument transformers.
4. Overvoltages, testing procedures and insulation
coordination.
a. High voltage testing procedures and statistical
treatment of results.
b. Insulation coordination.
8 Hrs
c. Modern power system protective devices.
5. Non-destructive insulation test techniques.
a. Dynamic properties of dielectrics.
b. Dielectric loss and capacitance measurements.
6 Hrs
c. Partial discharge measurements.
References:
1. N.H. Malik, A.A. Al-Arainy, M.I. Qureshi, Electrical insulation in power
system, Marcell &Dekker Inc, 1998.
2. Paul Gill, Electrical power equipment maintenance and testing, Second
Edition, CRC Press, 2008.
3. A. Bradwell (ed.), Electrical insulation, Peter Peregrinus Ltd., London,
England, 1983.
4. E. Kuffel, W.S. Zaengl, J. Kuffel, High voltage Engineering fundamentals,
Newnes (an imprint of Elsevier),2005.
5. Dieter Kind, Hermann Karner, High voltage insulation technology,
Translated from the German by Y. Narayana Rao, Friedr. Vieweg & Sohn,
Braunschweig, 1985.
A joint venture by IISc and IITs, funded by MHRD, Govt of India
http://nptel.iitm.ac.in